pcep/ietf-stateful02/src/main/java/org/opendaylight/protocol/pcep/ietf/stateful02/Stateful02PCReportMessageParser.java

   1 /*
   2  * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.protocol.pcep.ietf.stateful02;
   9
  10 import io.netty.buffer.ByteBuf;
  11
  12 import java.util.List;
  13
  14 import org.opendaylight.protocol.pcep.spi.AbstractMessageParser;
  15 import org.opendaylight.protocol.pcep.spi.ObjectHandlerRegistry;
  16 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
  17 import org.opendaylight.protocol.pcep.spi.PCEPErrors;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.Pcrpt;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.PcrptBuilder;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.lsp.object.Lsp;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.pcrpt.message.PcrptMessageBuilder;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.pcrpt.message.pcrpt.message.Reports;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.pcrpt.message.pcrpt.message.ReportsBuilder;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.pcrpt.message.pcrpt.message.reports.Path;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.pcrpt.message.pcrpt.message.reports.PathBuilder;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Message;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Object;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.bandwidth.object.Bandwidth;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.Ero;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.lsp.attributes.Metrics;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.lsp.attributes.MetricsBuilder;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.lspa.object.Lspa;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.metric.object.Metric;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.reported.route.object.Rro;
  35
  36 import com.google.common.collect.Lists;
  37
  38 /**
  39  * Parser for {@link Pcrpt}
  40  */
  41 public final class Stateful02PCReportMessageParser extends AbstractMessageParser {
  42
  43         public static final int TYPE = 10;
  44
  45         public Stateful02PCReportMessageParser(final ObjectHandlerRegistry registry) {
  46                 super(registry);
  47         }
  48
  49         @Override
  50         public void serializeMessage(final Message message, final ByteBuf buffer) {
  51                 if (!(message instanceof Pcrpt)) {
  52                         throw new IllegalArgumentException("Wrong instance of Message. Passed instance of " + message.getClass()
  53                                         + ". Nedded PcrptMessage.");
  54                 }
  55                 final Pcrpt msg = (Pcrpt) message;
  56                 final List<Reports> reports = msg.getPcrptMessage().getReports();
  57                 for (final Reports report : reports) {
  58                         buffer.writeBytes(serializeObject(report.getLsp()));
  59                         final Path p = report.getPath();
  60                         if (p != null) {
  61                                 if (p.getEro() != null) {
  62                                         buffer.writeBytes(serializeObject(p.getEro()));
  63                                 }
  64                                 if (p.getLspa() != null) {
  65                                         buffer.writeBytes(serializeObject(p.getLspa()));
  66                                 }
  67                                 if (p.getBandwidth() != null) {
  68                                         buffer.writeBytes(serializeObject(p.getBandwidth()));
  69                                 }
  70                                 if (p.getRro() != null) {
  71                                         buffer.writeBytes(serializeObject(p.getRro()));
  72                                 }
  73                                 if (p.getMetrics() != null && !p.getMetrics().isEmpty()) {
  74                                         for (final Metrics m : p.getMetrics()) {
  75                                                 buffer.writeBytes(serializeObject(m.getMetric()));
  76                                         }
  77                                 }
  78                         }
  79                 }
  80         }
  81
  82         @Override
  83         public Message validate(final List<Object> objects, final List<Message> errors) throws PCEPDeserializerException {
  84                 if (objects == null) {
  85                         throw new IllegalArgumentException("Passed list can't be null.");
  86                 }
  87                 if (objects.isEmpty()) {
  88                         throw new PCEPDeserializerException("Pcrpt message cannot be empty.");
  89                 }
  90
  91                 final List<Reports> reports = Lists.newArrayList();
  92
  93                 while (!objects.isEmpty()) {
  94                         final Reports report = getValidReports(objects, errors);
  95                         if (reports != null) {
  96                                 reports.add(report);
  97                         }
  98                 }
  99                 return new PcrptBuilder().setPcrptMessage(new PcrptMessageBuilder().setReports(reports).build()).build();
 100         }
 101
 102         private Reports getValidReports(final List<Object> objects, final List<Message> errors) {
 103                 final ReportsBuilder builder = new ReportsBuilder();
 104                 if (objects.get(0) instanceof Lsp) {
 105                         builder.setLsp((Lsp) objects.get(0));
 106                         objects.remove(0);
 107                 } else {
 108                         errors.add(createErrorMsg(PCEPErrors.LSP_MISSING));
 109                         return null;
 110                 }
 111                 if (!objects.isEmpty()) {
 112                         final PathBuilder pBuilder = new PathBuilder();
 113                         parsePath(objects, pBuilder);
 114                         builder.setPath(pBuilder.build());
 115                 }
 116                 return builder.build();
 117         }
 118
 119         private void parsePath(final List<Object> objects, final PathBuilder builder) {
 120                 final List<Metrics> pathMetrics = Lists.newArrayList();
 121                 Object obj;
 122                 State state = State.Init;
 123                 while (!objects.isEmpty() && !state.equals(State.End)) {
 124                         obj = objects.get(0);
 125                         switch (state) {
 126                         case Init:
 127                                 state = State.EroIn;
 128                                 if (obj instanceof Ero) {
 129                                         builder.setEro((Ero) obj);
 130                                         break;
 131                                 }
 132                         case EroIn:
 133                                 state = State.LspaIn;
 134                                 if (obj instanceof Lspa) {
 135                                         builder.setLspa((Lspa) obj);
 136                                         break;
 137                                 }
 138                         case LspaIn:
 139                                 state = State.BandwidthIn;
 140                                 if (obj instanceof Bandwidth) {
 141                                         builder.setBandwidth((Bandwidth) obj);
 142                                         break;
 143                                 }
 144                         case BandwidthIn:
 145                                 state = State.RroIn;
 146                                 if (obj instanceof Rro) {
 147                                         builder.setRro((Rro) obj);
 148                                         break;
 149                                 }
 150                         case RroIn:
 151                                 state = State.MetricIn;
 152                                 if (obj instanceof Metric) {
 153                                         pathMetrics.add(new MetricsBuilder().setMetric((Metric) obj).build());
 154                                         state = State.RroIn;
 155                                         break;
 156                                 }
 157                         case MetricIn:
 158                                 state = State.End;
 159                                 break;
 160                         case End:
 161                                 break;
 162                         }
 163                         if (!state.equals(State.End)) {
 164                                 objects.remove(0);
 165                         }
 166                 }
 167                 if (!pathMetrics.isEmpty()) {
 168                         builder.setMetrics(pathMetrics);
 169                 }
 170         }
 171
 172         private enum State {
 173                 Init, EroIn, LspaIn, BandwidthIn, RroIn, MetricIn, End
 174         }
 175
 176         @Override
 177         public int getMessageType() {
 178                 return TYPE;
 179         }
 180 }